<template>
<view v-if="goods_info.goods_name" class="goods-detail-container">
  <view>
      <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
        <swiper-item v-for="(item,i) in goods_info.pics" :key="i">
          <image :src="item.pics_big" @click="preview(i)"></image>
        </swiper-item>
      </swiper>
    </view>
    
  <!-- 商品信息区域 -->
  <view class="goods-info-box">
    <!-- 商品价格 -->
    <view class="price">￥{{goods_info.goods_price}}</view>
    <!-- 商品信息主体区域 -->
    <view class="goods-info-body">
      <!-- 商品名称 -->
      <view class="goods-name">{{goods_info.goods_name}}</view>
      <!-- 收藏 -->
      <view class="favi">
           <uni-icons type="star" size="17" color="gray"></uni-icons>
           <text>收藏</text>
      </view>
    </view>
      <!-- 运费 -->
    <view class="yf">快递：免运费</view>
  </view>
    
    <!-- 商品图文信息 -->
  <rich-text :nodes="goods_info.goods_introduce"></rich-text>
  
  <!-- 商品导航组件 -->
  <view class="goods_nav">
    <!-- fill 控制右侧按钮的样式 -->
    <!-- options 左侧按钮的配置项 -->
    <!-- buttonGroup 右侧按钮的配置项 -->
    <!-- click 左侧按钮的点击事件处理函数 -->
    <!-- buttonClick 右侧按钮的点击事件处理函数 -->
    <uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick" @buttonClick="buttonClick" />
  </view>
</view>
</template>

<script>
   import { mapState,mapMutations,mapGetters} from 'vuex'
  export default { 
   computed:{
     ...mapState('m_cart',[]),
     ...mapGetters('m_cart',['total'])
   },
   watch:{
    // total(newVal){
    //   console.log(newVal);
    //   const findResult= this.options.find(x=>x.text==='购物车')
    //   if(findResult){
    //     findResult.info=newVal
    //   }
    // } 
    total:{
       // handler 属性用来定义侦听器的 function 处理函数
      handler(newVal){
        const findResult= this.options.find(x=>x.text==='购物车')
        if(findResult){
          findResult.info=newVal
        }
      },
      // immediate 属性用来声明此侦听器，是否在页面初次加载完毕后立即调用
      immediate:true
    }
   },
    data() {
      return {
            goods_info:{},
            // 左侧按钮组的配置对象
            options: [{
              icon: 'shop',
              text: '店铺'
            }, {
              icon: 'cart',
              text: '购物车',
              info: 0
            }],
            // 右侧按钮组的配置对象
            buttonGroup: [{
                text: '加入购物车',
                backgroundColor: '#ff0000',
                color: '#fff'
              },
              {
                text: '立即购买',
                backgroundColor: '#ffa200',
                color: '#fff'
              }
            ]
      }
    },
    onLoad(optins) {
      const goods_id = optins.goods_id
      this.getGoodsDetail(goods_id)
    },
    methods: {
      ...mapMutations('m_cart',['add2cart']),
      async getGoodsDetail(goods_id){
        const {data:res} = await uni.$http.get("/api/public/v1/goods/detail",{goods_id})
        if(res.meta.status !== 200) uni.showMSg() 
         // 使用字符串的 replace() 方法，为 img 标签添加行内的 style 样式，从而解决图片底部空白间隙的问题
          // 使用字符串的 replace() 方法，将 webp 的后缀名替换为 jpg 的后缀名
        res.message.goods_introduce  = res.message.goods_introduce.replace(/<img /g,'<img style="display:block;"').replace(/webp/g,'jpg')
        this.goods_info= res.message
        console.log(res.message)
      },
      // 实现轮播图的预览效果
      preview(i){
        // 调用 uni.previewImage() 方法预览图片
        uni.previewImage({
          // 预览时，默认显示图片的索引
          current:i,
          // 所有图片 url 地址的数组
          urls:this.goods_info.pics.map(item=>item.pics_big)
        })
      },
      onClick(e){
        if(e.content.text==='购物车'){
          uni.switchTab({
            url:'/pages/cart/cart'
          })
        }
      },
      buttonClick(e){
        if(e.content.text==='加入购物车'){
          const goods={
            //{ goods_id, goods_name, goods_price, goods_count, goods_small_logo, goods_state }
            goods_id:this.goods_info.goods_id,
            goods_name:this.goods_info.goods_name,
            goods_price:this.goods_info.goods_price,
            goods_count:1,
            goods_small_logo:this.goods_info.goods_small_logo,
            goods_state:true 
          }
          this.add2cart(goods)
        }
      }
      
    }
  }
</script>

<style lang="scss">
swiper{
  height: 750rpx;
  image {
    height: 100%;
    width: 100%;
  }
}

.goods-info-box{
  padding: 10px;
  padding-right: 0;
  .price{
    color: #c00000;
    font-size: 18px;
    margin: 10px 0;
  }
  .goods-info-body{
    display: flex;
    justify-content: space-between;
    .goods-name{
      font-size: 13px;
      margin: 10px;
    }
    .favi{
      width: 120px;
      font-size: 12px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      border-left: 1px solid #efefef;
      color: gray;
    }
  }
  .yf{
    margin: 10px 0;
    font-size: 12px;
    color: gray;
  } 
}

.goods-detail-container {
  // 给页面外层的容器，添加 50px 的内padding，
  // 防止页面内容被底部的商品导航组件遮盖
  padding-bottom: 50px;
}

.goods_nav {
  // 为商品导航组件添加固定定位
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
}
</style>
